fixlook比较Helaytherewithhiseyeslookingatthesky.Thestudentsarelisteningtotheteacherwiththeireyesfixedontheblackboard.为什么第一句的look用-ing第二句的fix用-ed

Question

fix look 比较
He lay there with his eyes looking at the sky.
The students are listening to the teacher with their eyes fixed on the blackboard.
为什么第一句的look用-ing 第二句的fix用-ed

Answer 1

look 作状语,和逻辑主语之间是主动关系,所以用looking; fix one'seyes on sh.短语中我们可以看到one's eyes 和fix之间是动宾关系,所以当fix on做their eyes的定语的时候,fix要用过去分词,来表示他们之间的动宾（被动）关系,这句话还可以这么说：
The students are listening to the teacher ,fixing their eyes on the blackboard.
瞧,这里fix和逻辑主语之间是主动关系,就可以用现在分词形式了.